Eroare de compilare: user.cpp: In function ‘void solve_rectangle(int, int)’: user.cpp:94:15: error: reference to ‘is_empty’ is ambiguous while(is_empty()==false) ^ user.cpp:9:6: note: candidates are: bool is_empty() bool is_empty() ^ In file included from /usr/local/include/c++/4.8.0/bits/move.h:57:0, from /usr/local/include/c++/4.8.0/bits/stl_pair.h:59, from /usr/local/include/c++/4.8.0/bits/stl_algobase.h:64, from /usr/local/include/c++/4.8.0/bits/char_traits.h:39, from /usr/local/include/c++/4.8.0/ios:40, from /usr/local/include/c++/4.8.0/ostream:38, from /usr/local/include/c++/4.8.0/iostream:39, from user.cpp:1: /usr/local/include/c++/4.8.0/type_traits:536:12: note: template<class _Tp> struct std::is_empty struct is_empty ^